What is Donald Marcus's specialty?

Donald Marcus (NPI 1003880071) is a Medicare-billing provider whose primary specialty is Internal Medicine in Southampton, PA.

Where does Donald Marcus practice?

Donald Marcus practices in Southampton, PA, based on the location reported in the CMS Medicare provider datasets for NPI 1003880071.

How much does Medicare pay Donald Marcus?

Donald Marcus (NPI 1003880071) received approximately $187K in total Medicare Part B payments, serving 1,021 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1003880071

Donald MarcusM.D.

Internal MedicineSouthampton, PAI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

1,499

Unique beneficiaries

—

Total services

1,840

Distinct HCPCS

Medicare payment

$169K

Peer benchmark

Total Medicare services vs. 4,434 Internal Medicine providers in PA — top quintile (cohort median 550).

PRESCRIBING · PART D · 2024

Total Rx claims

787

Beneficiaries

—

Total drug cost

$1.5M

Distinct drugs

Brand share

65.8%

Top prescribed drugs

Bictegrav/Emtricit/Tenofov Ala95 claims

Abacavir/Dolutegravir/Lamivudi52 claims

Cephalexin51 claims

Ceftriaxone Sodium43 claims

Elviteg/Cob/Emtri/Tenof Alafen42 claims

QUALITY · MIPS · 2024

Final MIPS score

98.5

Quality

86.7

Cost

79.3

Improvement activities

40.0

Promoting interop.

0.0

Payment adjustment

0.99%

Group

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2024

Total received

$560

Payment records

By payment type

Food and Beverage$560

Top paying entities

Food and Beverage$560

FACILITY AFFILIATIONS

Hospital & Facility Affiliations (5)

Hospital

Hospital

Hospital

Hospital

Hospital

REFERRAL NETWORK

Where Donald Marcus's patients come from & go

Directional shared-patient flow from Medicare claims — who sends patients to this provider (inbound) and where this provider's patients go next (outbound). 147 inbound referrers · 277 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
Quest Diagnostics Clinical Laboratories Inc Clinical Laboratory · Norristown, PA	117	872
Divya Sareen Infectious Disease · Southampton, PA	116	360
NAZARETH HOSPITAL	102	182
Sreethy Saraswathy Infectious Disease · Southampton, PA	100	339
Angela Lawton Infectious Disease · Southampton, PA	95	388
Joseph Kim Diagnostic Radiology · Hamilton, NJ	84	200
Davindra Seelagan Diagnostic Radiology · Hamilton, NJ	81	187
Gustavo Sanchez Diagnostic Radiology · Hamilton, NJ	76	290
Syed Zaidi Infectious Disease · Southampton, PA	67	291
Philip Deibert Internal Medicine · Langhorne, PA	62	222
Richard Scafidi Diagnostic Radiology · Hamilton, NJ	61	118
William Mechanic Diagnostic Radiology · Hamilton, NJ	60	138

Refers patients to

Outbound — where patients go next

Physician	Patients	Visits
ST MARY MEDICAL CENTER	222	1,001
Divya Sareen Infectious Disease · Southampton, PA	116	344
Quest Diagnostics Clinical Laboratories Inc Clinical Laboratory · Norristown, PA	108	940
Angela Lawton Infectious Disease · Southampton, PA	100	435
David Trumbore Infectious Disease · Southampton, PA	93	257
MERCY HOME HEALTH	86	138
NEWTOWN AMERICAN LEGION AMBULANCE SQUAD	85	206
Syed Zaidi Infectious Disease · Southampton, PA	84	264
Sreethy Saraswathy Infectious Disease · Southampton, PA	79	307
FORMAN, WENDY	74	179
NAZARETH HOSPITAL	64	146
Gustavo Sanchez Diagnostic Radiology · Hamilton, NJ	63	175

Source: CMS Physician Shared Patient Patterns (30-day window, Medicare FFS). Direction = a beneficiary seen by the first provider, then the second, within 30 days; a proxy for referral, not a documented referral. Pairs with fewer than 11 shared beneficiaries are suppressed.

CROSS-REFERENCE

Related data on other Healthparse brands

ProviderScore

OIG/SAM exclusion screening, sanctions history

Healthparse Signals

Monitor this provider for changes — dated NPI change events